Wire grating.



PATBNTED 0GT.18, 1904. J. MELLES. WIRE GRAI'ING. APPLICATION FILED MAR.19, 1903.

a sums-sum 1.

NO MODEL.

PATENTED OCT. 18, 1904. J. MBLLES. I WIRE GRATING. APYLIOATION FILEDMAR. 19, 1903.

2 Sums-sum 2.

' N0 MODEL.

m nowowonouo w oxU To all whom it may concern.-

piece of'ordinary'g'ratin'g. Fig. tillustrates UNITED STATES PatentedOctober 18, 1904.

PATENT OFFICE.

BRIEG, GERMANY, ASSIGNOR TO C. SGHGNFELDER &

GERMANY.

WIRE GRATING.

SPECIFICATION forming part of Letters Patent No. 772,424, dated October18, 1904.

Application filed March 19, 1903- Be it known that I, JAMES MELLES, asubject of the King of Prussia, Emperor of Germany, residing at Brieg,Germany, have invented certain new and useful Improvements in WireGratings, of which the following is a specification.

This invention relates to the manufacture of unitary panels orstructures of wire grating or the like having patterns of differentwidth of mesh. If such wire grating or the like is-to be manufactured,the wires of the wide-mesh grating must pass also through thenarrow-mesh grating. The construction of such gratings has been effectedhitherto by attaching the wires running in one direction to thoserunning in the other direction by clamps or similar devices, the use ofwhich increases, of course, the price of the grating and is detrimentalas regards appearance. Further, gratings thus made with clamps have nogreat strength, because they have no hold in themselves. Anotherdisadvantage of such method of construction is that gratings" of verynarrow mesh cannot be: made at all on account of the width of theclamps.

My invention overcomes these disadvantages, and consists in-theconstruction of wire gratings of different widths of mesh in one piecein which the wires of'the wide mesh and those of the narrow mesh areinterwoven, so as to. form a network without clamps or similarlockingdevices, so that the grating holds itself together and is thus ofgreat strength and so that there shall be no limitation as to narrownessof mesh.

Figures 1 and 2 illustrate two different kinds of corrugations of wiresused in the manufacture of wire, gratin-g. Fig- 3 illustrates a afinished grating -made according to my invention. -Figs. 5 and 6"show.variations of one method of carrying out my invention. Fig. 7 showsanother method of carrying out my invention. Fig, 8 shows a detail offinishing the grating.

v In the manufacture of ordinary wire gratings and the like by hand therods or wires Serial No. 148,483- (No model.)

bending them by hand. Fig. 1 illustrates such a wire rod in which thecorrugations are continuous throughout. Fig. 2 illustrates such a wirein which the corrugations or indents are a certain distance apart fromone another, according to the width of mesh, and when the wires are tocross one another the corrugations being directed partly upward andpartly downward, as required by the desired interlacing. For instance,if quite a simple wire net or grating is required the corrugated wirerods are placed so that they pass alternately over and under the wirerods which cross them.

The manufacture of a grating with narrow and wide meshes in one piece,such as is shown as example in Fig 4:, may be effected in two diflerentways. Either the wide-mesh part is made the basis of the network orgrating and intermediate wire rods are interlaced between them or thenarrowmesh part forms the basis and oniy a certain number of rods ofthis part are allowed to pass through the part which is be of wide mesh.The former wire rods corrugated as illustrated in Fig. 2 and the secondmethod as regards wire rods corrugated as illustrated in Fig. 1. Thewidth of mesh is determined by the distance between the corrugations,and it is not suitable to obtain the difference of width of mesh by75.1. method comes into consideration as. regards the omission of wiresof the narrow mesh in the net or grating. In the. case of wirescorrugated according to Fig. 1 the appearance of unused corrugations isnot unsightly. However, it is essential in both methods that the.

rods of the base-net should not be indented or corrugated differently asregards that partof their length which is in the other net-and asregards the other part of their length, so that they may be uniformlyprepared preliminarily without further considerations. For this reasonwhen the wide-mesh part of the net or grating forms the base-net theintermediate rods for the construction of the narrow-mesh part areplaced between the main rods in such a manner that they always run aboveor below the latter. If the narrowmesh part forms the basis, the mainrods cannot run through the wide-mesh part and stop at it alternatelyunless the rods are corrugated differently for the wide-mesh part;otherwise in consequence of the existing corrugations it would beimpossible to form a regular connection in the wide-mesh part of thegrating, which, however, is absolutely necessary for the formation of anet. Therefore only every fourth, eighth, &c., rod of the narrow-meshnet may be continued in the wide mesh.

Fig. 5 illustrates, at an enlarged scale rela' tively to Fig. 4, a partof grating made according to the first method. In order to render theconstruction clear, the rods of the wide-mesh pa'rt forming the basis inthis case and which are continued in the narrow-mesh part are drawnthicker than the intermediate rods placed between them. The main rodsrunning in one direction are marked A B (J, and those crossing them inthe other direction are marked I II III, &c. The interme diate rods aremarked a b c, &c., and 1 2 3, &c., respectively. On the work-table, forinstance, the outlines of the different parts of the grating are drawn,so that the operator may know not only how far he has to carry theintermediate rods, but also how far he has to carry the main rods.

The operation is then as follows: If, for instance, a wide-mesh part hasto be produced, in which case the intermediate rods may be consideredfirst as not present, the wires II and IV of thewires I andTI III IVplaced on the table are firstlifted', and then the rod B, forinstance,'is placed in position; Then follows the lifting of the'rods IIII V, &c., and the insertion of the. rod C. The operation is thenrepeated. f At such parts of the drawings outlined on the table in whichany pattern requires the insertion of intermediate rods the procedure isas follows: First, the correspondingintermediate rods. 1 2 3 4, &c., areplaced on the work-table. Should it happen that a main rod-for instance,B.is to be inserted, this is to be effected in the same manner asdescribed before-'. a, the wires II IV,.&c., could be previously lifted.Before the insertion of the intermediate rod 6 which'succeeds the'mainrod ,B the intermediate rods 1 2 3 4, &c. are lifted, but allsimultaneously. Now follows the lifting of the main rods I III V, &c.,then the insertion of rod C, then, again, the lifting of intermediaterods 1 2 3 4, &c., simultaneously, insertion of intermediate rod 0, andthus the operation continues.

Fig. 6 illustrates still more clearly the procedure just described. Inthis case two intermediate rods instead of one rod, as before, are

placed between two main rods, so that the width of mesh of thenarrow-mesh part of the grating is x/ 3. The intermediate rods 1 2 3,&c., pass each time below the main rods A B, &c., and the intermediaterods a 6 ad, &c. pass each time over the main rods I II, &c. The mainrods form an independent net among themselves. The intermediate rods donot form again a real net by themselves, but are situated loosely overeach other. As before, they are held by the main or base net.

Fig. 7 shows a grating made according to the second method of wirecorrugated according to Fig. 1, and any further description thereofappears to be superfluous. If the grating has been thus made, a frame 1,Fig. 4, may be placed thereon in order to more clearly define the partsof different widths or mesh, and such frame or border may be connectedto the wire rods in the manner shown as an example in Fig. 8-. Of coursethe illustration of thick and thin rods is chosen only for theclearer'understanding of the mode of manu' facture. The thickness of thewires is of no consequence. If preferred, the formation of the base netor grating maybe suitably modified and'made more complicated, andinstead of forming the meshes square they may be polygonal.

What I claim, and desire to secure by Letters Patent of the UnitedStates, is

In a wire grate a series of straight wires, each wire havingcorrugations, such corrugations being provided at equal distances, onehalf of the corrugations being bent in opposite direction to theremaining half, another series of straight wires, provided at rightangles to the former wires, being corrugated in like manner and arrangedso that the corrugations of the one series of wires with their concavesides lie within the corrugations of the other series of wires, bothseries forming a network, further series of wires being of smallerlength each single wire of which being provided within the space of eachtwo wires of the former two series, such wires having corrugations, theconcave sides of which being in contact with the wires of the former twoseries, and metal strips covering 1 the ends of the shorter wires.

In testimony whereof I have hereunto set my hand in the presence of twowitnesses.

JAMES MELLES.

. Witnesses:

Cum: PFEIF'FER, ARTHUR Fnuena.

